"There's just one problem, though: the 'nine young investors' don't really exist - according to the last tweet on the @NokiaPlanB Twitter account, it was all a hoax perpetuated by 'one very bored engineer who really likes his iPhone'. Ouch."

There is technologic lock-in: you have to make choices because you cannot do everything (such as have code run everywhere without modification).

And then there is vendor lock-in, where the owner abuses his position. One such example is Apple changing the (vague) rules of their app store at whim; another one is... Microsoft banning GPL from their app store: http://i.imgur.com/fQraD.png